China. (French Indo-China). 1941. Air Mail envelope addressed to France bearing Indo-China SG 168, 1c brown, SG 171, 3c green and SG 207, 37c olive tied by Tinh-Tuc/ Tonkin date stamp with 'Controle Postal Militaire' label tied by oval 'Ouvert Par/L' Autorite Militaire' with circular 'A/5' censor in blue, endorsed 'via Bagdad' and routed via Hanoi with 'Passed by Examiner' label. Superb.